[Vendor] blevesearch v0.8.1 -> v1.0.7 (#11360)

* Update blevesearch v0.8.1 -> v1.0.7

* make vendor

Co-authored-by: zeripath <art27@cantab.net>

vendor/github.com/blevesearch/zap/v12/intDecoder.go

@@ -0,0 +1,111 @@
+//  Copyright (c) 2019 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package zap
+
+import (
+	"encoding/binary"
+	"fmt"
+
+	"github.com/blevesearch/bleve/index/scorch/segment"
+)
+
+type chunkedIntDecoder struct {
+	startOffset     uint64
+	dataStartOffset uint64
+	chunkOffsets    []uint64
+	curChunkBytes   []byte
+	data            []byte
+	r               *segment.MemUvarintReader
+}
+
+func newChunkedIntDecoder(buf []byte, offset uint64) *chunkedIntDecoder {
+	rv := &chunkedIntDecoder{startOffset: offset, data: buf}
+	var n, numChunks uint64
+	var read int
+	if offset == termNotEncoded {
+		numChunks = 0
+	} else {
+		numChunks, read = binary.Uvarint(buf[offset+n : offset+n+binary.MaxVarintLen64])
+	}
+
+	n += uint64(read)
+	if cap(rv.chunkOffsets) >= int(numChunks) {
+		rv.chunkOffsets = rv.chunkOffsets[:int(numChunks)]
+	} else {
+		rv.chunkOffsets = make([]uint64, int(numChunks))
+	}
+	for i := 0; i < int(numChunks); i++ {
+		rv.chunkOffsets[i], read = binary.Uvarint(buf[offset+n : offset+n+binary.MaxVarintLen64])
+		n += uint64(read)
+	}
+	rv.dataStartOffset = offset + n
+	return rv
+}
+
+func (d *chunkedIntDecoder) loadChunk(chunk int) error {
+	if d.startOffset == termNotEncoded {
+		d.r = segment.NewMemUvarintReader([]byte(nil))
+		return nil
+	}
+
+	if chunk >= len(d.chunkOffsets) {
+		return fmt.Errorf("tried to load freq chunk that doesn't exist %d/(%d)",
+			chunk, len(d.chunkOffsets))
+	}
+
+	end, start := d.dataStartOffset, d.dataStartOffset
+	s, e := readChunkBoundary(chunk, d.chunkOffsets)
+	start += s
+	end += e
+	d.curChunkBytes = d.data[start:end]
+	if d.r == nil {
+		d.r = segment.NewMemUvarintReader(d.curChunkBytes)
+	} else {
+		d.r.Reset(d.curChunkBytes)
+	}
+
+	return nil
+}
+
+func (d *chunkedIntDecoder) reset() {
+	d.startOffset = 0
+	d.dataStartOffset = 0
+	d.chunkOffsets = d.chunkOffsets[:0]
+	d.curChunkBytes = d.curChunkBytes[:0]
+	d.data = d.data[:0]
+	if d.r != nil {
+		d.r.Reset([]byte(nil))
+	}
+}
+
+func (d *chunkedIntDecoder) isNil() bool {
+	return d.curChunkBytes == nil
+}
+
+func (d *chunkedIntDecoder) readUvarint() (uint64, error) {
+	return d.r.ReadUvarint()
+}
+
+func (d *chunkedIntDecoder) SkipUvarint() {
+	d.r.SkipUvarint()
+}
+
+func (d *chunkedIntDecoder) SkipBytes(count int) {
+	d.r.SkipBytes(count)
+}
+
+func (d *chunkedIntDecoder) Len() int {
+	return d.r.Len()
+}